func main()
	var n: int :: cui@inputInt()
	var x: int :: cui@inputInt()
	var c: []int :: #[n]int
	for i(0, n - 1)
		do c[i] :: cui@inputInt()
	end for
	
	var ans: bool :: c.min() <= x & x <= c.max()
	do cui@print(ans ?("Yes\n", "No\n"))
end func